How to stop double redirect on https and www in ASP.NET Core 6?

Question

I was using IIS rewrite rules in web.config to do my HTTPS and non-www canonical URI enforcement, but then using Web Deploy became complicated so I switched to ASP.NET Core 6 middleware. Here's my code from Program.cs:

app.UseRewriter(new RewriteOptions().AddRedirectToNonWwwPermanent());
app.UseHttpsRedirection();

For http://example.com and https://www.example.com it works great and there is a single redirect.

But, for http://www.example.com it now implements the non-www rule, then the https rule, so you get two 308 redirects chained together (with IIS I had this with a single redirect).

You can test it here: https://www.redirect-checker.org/index.php

Enter: http://www.magazedia.com/

http://www.magazedia.com
308 Permanent Redirect
http://magazedia.com/
308 Permanent Redirect
https://magazedia.com/
200 OK

This plays havoc with my OCD.

Is there a simple fix or do I need to write a custom redirect that combines both?

EDIT:

I also just tried this, but the result is the same (double redirect):

app.UseRewriter(new RewriteOptions().AddRedirectToNonWwwPermanent().AddRedirectToHttpsPermanent() );
// app.UseHttpsRedirection();

user_7609093 · Answer

As far as I know, the asp.net core url rewrite middleware also support using the url rewrite rule xml.

You could create a url reiwte xml named IISUrlRewrite.xml and like below:

Then modify the startup.cs(.net 5) or program.cs(.net 6)

       using (StreamReader iisUrlRewriteStreamReader = 
            File.OpenText("IISUrlRewrite.xml")) 
        {
            var options = new RewriteOptions()
                .AddIISUrlRewrite(iisUrlRewriteStreamReader)
            app.UseRewriter(options);
        }

More details, you could refer to this article.

How to stop double redirect on https and www in ASP.NET Core 6?

1 Answers